麦蜘蛛,俗称火龙、火蜘蛛,主要有麦圆蜘蛛和麦长腿蜘蛛。现将麦蜘蛛为害症状、发生特点和防治方法介绍如下:为害症状麦蜘蛛成、若虫刺吸麦苗汁液,被害麦叶出现黄白色小点,后变为黄色,严重时植株矮小,叶片枯黄,不能正常抽穗,甚至干枯而死。发生特点麦长腿蜘蛛一年发生3~4代,以成虫和卵在土缝中越冬,翌年3月越冬成虫开始活动,卵也陆续孵化,4~5月进入 Wheat spiders, commonly known as fire dragon, fire spider, mainly wheat round spider and wheat long legs spider. Now the symptoms of wheat spider damage, the occurrence of characteristics and prevention methods are described below: damage symptoms Spider into wheat, nymphs pierce the wheat seedlings juice, the wheat leaves appear yellowish white dots, yellow after the serious, when the plants are short, yellow leaves, can not Normal heading, or even died. Occurred characteristics Wheat long leg spiders occurred 3 to 4 generations a year to adults and eggs in soil cracks in the winter, the following year in March began to overwinter adult eggs, eggs have gradually hatch, 4 to 5 months to enter